<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
	String callback = request.getParameter("callback")	;

	if(null != callback && !"".equals(callback)){
		out.print(callback+"({\"abc\":123})");
	}
	else{
		out.print("{\"abc\":123}");
	}

%>